Well, what you could do ( as a bit of a "bodge") is get a small centre punch and carefully punch around the inside of the bore that the bearing goes into. This will raise little spots that may take up any slack when the bearing is fitted.
Now this is dependent on how badly the bore is worn, how thick the wall of the bore is, and how much stick you're going to give it

and is still a "bodge", ie.get you out of a scrape.
Loctite will "fill" a slight gap but that's not ideal either, it's not really designed for that.
Is it a steel or ally part that the bearing fits into?